I bought a portable AC about 5 years ago for our apartment. Just used it in a 18×12 living room. Throw a blanket over the doorway to keep the cool in and it's a comfortable 73. Think it was a 12k BTU. It was a bit noisy, but made things much more comfortable. I've got central in my house house now. I set it for 76-78. May seem high, but it removes the humidity from the air. I need to upgrade my AC though because I've got the old style which cost a ton to recharge compared to the new refrigerant.
